JPH09301312A - Article packaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a packaging without swelling and slacking by a method wherein a sheet material is bent while an upper downward bending plate, a lower upward bending plate, and an upper inward bending part, which are being urged, are being slidably brought into contact with. SOLUTION: In an upper bending downward device 131, when an upper bending downward plate 144 is driven to be lowered, the leading end of the bending downward plate 144 which is urged by a spring, bends the upper overhang part of a sheet material, downward, and a bent corner part of the sheet material 4 is angled. Then, while the upper bending downward plate 144 is being lowered, in a lower bending upward device 132, when a lower bending upward plate 154 being pneumatically urged, is driven to be raised, the leading ends of the top and bottom overhang parts of the sheet material are bent, and the bent corner parts are squared, and then, the upper bending downward plate 144 is removed upward. Then, in an upper bending inward device 133, an upper bending inward plate 168 being urged downward by a spring, is placed under a horizontal state, and then, a lower overhang part which protrudes above an article 3, is bent. At this time, while the lower overhang part is being pressed to the upper surface of the article 3, the bent corner part is squared, and the lower overhang part is bent into a flat surface shape without slack to complete the packaging.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging device for automatically packaging rectangular parallelepiped articles such as laminated steel sheets.

[0002]

2. Description of the Related Art Conventionally, when wrapping a laminated product of steel plates that have been cut to a standard length and leveled with packing paper for the purpose of rust prevention, etc., the laminated product should be placed on the packing paper spread on the surface plate etc. Since the packaging was done by hand, it was very inefficient because it required manpower. In particular, when wrapping the front and rear, right and left, and the top and bottom of the laminated product with the packaging paper, it takes time and labor and it is difficult for one person to work.

Therefore, the applicant of the present invention has filed Japanese Patent Application Laid-Open No. 3-226415.
The article wrapping device disclosed in Japanese Patent Publication is proposed. According to this article packaging apparatus, the upper surface of the article can be wrapped by the sheet material automatically and efficiently without the need for manual operation during conveyance by the conveyor, and labor saving can be achieved.
In particular, it was possible to obtain a packaging device suitable for packaging the top surface of a large heavy article that cannot be handled manually, but in order to obtain a packaging state with an excellent appearance without sagging or blistering of the packaging paper, There was room for further improvement.

[0004]

That is, in the above-mentioned article wrapping apparatus, the article is wound by a sheet material wider than the article, and the overlapping portion of the sheet material extending in the conveyor width direction is heat-sealed by a heater for heat bonding. Following the process, in the folding device portion that bends the left and right overhanging portions of the sheet material on the side of the article, as shown in FIG. 46, the upper overhanging portion 231 of the sheet material 4 is lowered by the folding plate 301. After being bent by driving in the direction of approaching the side surface of the article (direction of arrow j),
By the rotational drive of 2 in the direction of arrow k, the lower bulge 232 and the upper bulge 231 are made by the pressing sheet 303 made of a flexible material.
The sheet material 4 in the folded and folded state in which the article 3 is wrapped by driving the conveyor in this state is advanced in the direction of the arrow Y, and is used in the subsequent adhesive tape attaching step. , Arrow j by the folding plate 301 described above
Sheet material 4 that covers the upper surface of the article when driven toward the direction
It is easy for the bending plate 301 to sag, and it is difficult to bend the lower projecting portion 232 into a flat plane in which the bending corner portion 304 is formed at a right angle by the covering pressure of the pressing sheet 303. It was likely to be in a bent state having swelling and slack in combination with the interposition with the article 3. (Note that some of the reference numerals and names in FIG. 46 are different from those in the above-mentioned publication.)

The present invention solves the above-mentioned problems of the prior art, and provides a packaged product having an excellent appearance in which the sheet material for packaging the article has no swelling or sagging and the bent corners are bulged. An object of the present invention is to provide an article packaging device.

[0006]

According to a first aspect of the present invention, there is provided an article wrapping apparatus which is provided on both left and right sides of a conveyor for conveying articles and which has a heat-adhesive sheet material wound on an article in a body-wrapping manner on the conveyor. An ear folding device that folds the front and rear ears of the overhanging portion is provided, and a lifting platform that is supported so that it can be raised and lowered above the conveyor, and it is arranged on both the left and right sides of the conveyor and moves in the left and right directions. A free traverse table and a movable frame that is movably supported by the elevating table in the left-right direction and is engaged with the elevating table to move up and down together with the elevating table and move in the left-right direction together with the traverse table are provided. Direction, and an upper lower bending device that includes an upper lower bending plate that is supported by the moving frame so as to be able to move up and down, and that includes a drive unit for driving the upper lower bending plate up and down. Articles extending in the direction And the lower the music apparatus comprising equipped with on the lower curved plate lift drive for driving machine with a lower on curved plate to vertically movably supported on the transverse table, which is biased toward the side surface,
An upper inner curved plate that extends in the front-rear direction and is urged toward the upper surface of the article and movably supports the upper inner curved plate in the left-right direction on the moving frame, and also includes a drive device for driving the upper inner curved plate left and right. And a bending device for bending the upper and lower overhanging portions of the left and right overhanging portions, which are arranged on both left and right sides of the conveyor.

According to a second aspect of the present invention, a heater for heat-bonding a sheet material is provided on the upper inner curved plate of the upper inner curved device so as to be capable of projecting and retracting downward.

According to a third aspect of the present invention, the ear-folding device is interlocked with a first rotor rotatably supported around a vertical axis on a side of the conveyor, and ascending and descending of the elevating table. It comprises a second rotor which is vertically moved and arranged above the first rotor, and is rotationally driven around the vertical axis together with the first rotor by a rotary drive machine.

According to a fourth aspect of the present invention, the first rotor and the second rotor are provided with brushes at their tips.

In the present invention, the front side refers to the side of the article traveling direction by the conveyor for transferring articles, and the rear side refers to the opposite side. The left-right direction refers to the width direction of the conveyor.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A specific example of the present invention will be described below with reference to FIGS. 1 to 45. First, FIGS. 1 to 3 show the whole of the article wrapping apparatus 1, but illustration of a folding device section for folding the left and right overhanging portions of the sheet material 4 wound around the article 3 is omitted. In these figures, 2 is a conveyor for conveying articles, and is an article 3 made of a laminate of steel plates.
Is conveyed by the charging conveyor 261 on the rear side, is conveyed on the conveyor 2, is wrapped by the sheet material 4 made of single-sided polyethylene laminated kraft paper, and is discharged forward by the discharging conveyor 262 on the front side. . 1A is a left-right center line of the article packaging apparatus 1 (= left-right center line of the conveyor). Reference numeral 5 is a base frame fixedly mounted on the foundation, and is composed of beam members, girder members, and the like above the columns 5B and 5C erected on the base 5A. Reference numeral 6 denotes a body-wrapping device which is formed at the entrance of the conveyor 2 and which winds the sheet material 4 around the article 3, the details of which will be described later. In addition, 7a and 7b are moving frames 60 which are automatic tape sticking machines for sticking on the upper surface.
It is supported by a and 60b (described later) so as to be movable in the left-right direction. The tape applying machines 7a and 7b are provided with a commercially available tape head for applying the upper surface, detect the passage of the article 3 by a sensor (not shown), and move the tape head up and down to automatically apply and cut the adhesive tape 8. It is a thing.

As shown in FIGS. 4 to 7, the conveyor 2 includes three slats conveyors 11a, 11 extending in the front-rear direction.
b, 11c, slat conveyors 11a, 11b
The slat conveyor 1 near the left and right ends of the article 3.
1c similarly conveys while supporting the vicinity of the central portion, and these conveyors are movable in the left and right directions so that the interval between the slat conveyors 11a and 11b can be adjusted according to the width of the article 3. There is.

That is, the slat conveyors 11a, 11b are mounted on the traverse tables 13a, 13b which are movably supported in the left-right direction by the guide rails 12, 12 laid on the base 5A.
The frames 14a and 14b of 11b are fixedly mounted, and the frame 14c of the central slat conveyor 11c is fixedly mounted on the base 5A through a prism 15 (see FIG. 7) extending in the front-rear direction. Reference numeral 16 denotes a hydraulic cylinder which is a drive device for adjusting the conveyor interval, and the cylinder portion is supported by the base 5A, and the tip of the piston rod is connected to one of the traverse bases 13b. In addition, 17 is both traverse stand 13
a, 13b and thus both slat conveyors 11a, 11b
Is a synchronizer that keeps the
As shown in FIG. 5, the rack 18 connected to the pedestal 13a
a and a rack 18b connected to the traverse table 13b are engaged with and synchronized with a pinion 19, 20 is a pressing roller, and 21 is a bracket erected on a base 5A that pivotally supports the pinion 19 and the pressing roller 20. is there. The pinions 19 and 19 of the two synchronizers 17 and 17 which are spaced apart from each other in the front-rear direction are integrally connected by a connecting shaft 22 that penetrates through the prismatic body 15, whereby the slat conveyors 11a and 11b are parallel to each other. Maintained.

A drive shaft 25 is rotatably driven by a conveyor drive device 26. The drive shaft 25 is a spline shaft rotatably supported by bearings 27, 27 on a bracket erected on the base 5A. Conveyors 11a, 11
The drive sprockets b and 11c (not shown) are fitted in spline holes at the center of the drive sprockets, and these slat conveyors are driven to rotate at the same speed.

On the other hand, in FIGS. 1 to 3, reference numeral 30 denotes an elevating platform which is supported above the conveyor 2 so as to be vertically movable, and its rear portion is vertically movably guided by a guide rail 31 attached to a column 5C. Is driven up and down by a hydraulic cylinder 32 attached to the upper beam of the base frame 5. Reference numeral 33 is a rack and pinion type synchronizing device that regulates the lifting table 30 so as to move up and down while maintaining a horizontal state. The pinion 35 that meshes with four racks 34 whose lower ends are connected to the lifting table 30 is connected to a connecting shaft 36. , 36, 37 and gearboxes 38, 38 orthogonal to the input / output axis are used for synchronous rotation.

The lower beam portion 30B, which is connected to the upper beam portion 30A below the upper beam portion 30A in a stepwise manner, is provided with a main portion of a body winding device 6 to be described later. Also 40 is
A roll support frame vertically movably supported by guide rails 41 provided on the columns 5C and 5C, and a rack 42 fixed to the roll support frame 40 and a rack 43 fixed to the upper beam portion 30A of the lifting platform 30. , The pinion 44 pivotally supported on the support column 5C, and the roll support frame 4 interlocked with the lifting and lowering of the lift table 30.
It is configured such that 0 moves up and down in the opposite direction to the lift table 30 by the same amount as the lift table. A roll 4R of the sheet material 4 is rotatably supported on the roll support frame 40 by a support shaft 45 extending in the left-right direction so that the sheet material can be pulled out. In this specific example, the support disk 4 having three support shafts 45 is provided.
6 is rotated by the drive unit 47 and three rolls 4
Although R is used and replenished sequentially, the supporting structure of this roll may be other than the above three-roll type.

In FIGS. 1 and 3, reference numeral 50 denotes an article height measuring device attached to the central portion of the rear surface of the lower beam portion 30B of the elevating table 30. The piston moves downward and its tip abuts against the upper surface of the article 3. The amount is measured by the encoder and the lift 30
Is issued to the hydraulic cylinder 32, which is an elevating and lowering device, for descending to a predetermined position according to the height h of the article 3. Further, 51 is a guide roller pivotally supported by a bracket 52 fixed to the support 5C and provided as needed for supporting the article 3, 53 is a rear guide plate fixed to the bracket 52 via a support beam 54, and 55. Is a front guide plate whose both ends are supported by a guide 56 attached to the bracket 52 so as to be able to move up and down, and is driven up and down by an air cylinder 57, both of which are provided at the entrance of the conveyor 2. Also, 58 is a semi-cylindrical stocker fixedly installed on the foundation below the entrance of the conveyor 2, and is for temporarily storing the lower portion of the sheet material 4 that is drawn from the roll 4R and hung down. As the stocker for temporarily storing the lower portion of the sheet material 4, in addition to the container-shaped stocker 58 described above, a pit having a depth for accommodating the lower portion of the sheet material 4 in a suspended state is used as a foundation for deep digging. May be good, Japanese Patent Laid-Open No. 50-
The belt conveyor for laying the wrapping paper disclosed in Japanese Patent No. 109079 may be installed and used from below the inlet of the conveyor 2 to below the feed conveyor 261.

Further, in FIGS. 1 and 2, 60a, 6
Reference numeral 0b denotes a moving frame that is supported on the lifting table 30 so as to be movable in the left-right direction by a guide rail 61 provided on the lower surface of the upper beam portion 30A of the lifting table 30. The outer side surface portions of these moving frames are the traverse tables 13a and 13b. The guides 64, 64 extending in the up-down direction provided on the arms 62, 63 whose bottoms are fixed to each other are guided to be movable up and down with respect to these arms, whereby the moving frames 60a, 60b are moved up and down.
It moves up and down together with it and moves in the left-right direction together with the traverse stands 13a and 13b. Further, the width detectors 67a, 67b of the sheet material 4 are provided on the rear surfaces of the mounting frames 66a, 66b, which are fixed to the upper portions of the other arms 65a, 65b, the lower portions of which are fixed to the traverse bases 13a, 13b. Is attached, and the tape sticking machine 7 is attached to the front of the traverse stands 13a and 13b.
a and 7b are supported by guide rails 68 (see FIG. 28) so as to be movable in the left-right direction, and are connected to the width detectors 67a and 67b through interlocking mechanisms 69. 25 to 28, which will be described later.

8 to 13 showing the body winding device 6 part, 71 is a pinch roll for feeding the sheet material 4 from the roll 4R, which is provided above the entrance part of the conveyor 2 and is provided with the lifting table 30. Drive roll 71 whose both ends are rotatably supported by the lower beam portion 30B and is driven to rotate by a drive machine 72.
A and a free roll 71B that is driven to approach and separate from the drive roll 71A in the front-rear direction. The free roll 71B is rotatably supported by a girder 74 supported by the lower beam portion 30B by a guide rail 73 so as to be movable in the front-rear direction. Reference numeral 75 is an air cylinder for driving the girder 74 back and forth. Reference numeral 77 denotes an air blow-out pipe, which is fixedly attached to the lower beam portion 30B, has a large number of air blow-out ports 78 that open forward, and is connected to a compressed air supply source (not shown).

Reference numeral 80 denotes a sheet material trailing end portion winding device, which is at a lower end position 81A shown by a chain line in FIG. 8 and is at a front position of the sheet material 4 hanging from the pinch roll 71 and from the pass line 2A of the conveyor 2. The roller 81, which is positioned on the lower side and extends in the left-right direction, is supported by a roller support mechanism 83 so as to be movable in the up-down direction and the left-right direction, and is provided with a roller driving machine 84 that rotationally drives the roller 81. Then, the roller support mechanism 83 is configured so that the roller 8 is fixed by the guide cylinders 87 fixed to both ends of the girder 86 guided in the front-rear direction by the guide rails 85 provided on the lower beam portion 30B.
The first bearing portion 82, 82 is supported so as to be able to move up and down, and air cylinders 88, 88 for raising and lowering the bearing and air cylinders 89, 89 for driving the girder 86 back and forth are provided.

Reference numeral 91 denotes a heat-bonding heater extending in the left-right direction, which can be moved up and down by a guide bush 93 attached to a beam 92 fixed to the lower beam portion 30B at a position in front of the roller 81 at the forward end position. It is supported and is driven up and down by an air cylinder 94. Again 96
The heat-bonding heater 91 and the roller 8 at the forward end position
A chain provided between the sprocket 98 and 99 pivotally supported by a beam 97 having both ends fixed to the lower beam portion 30B by a cutter provided with a cutting blade 102 for cutting the sheet material 4 at a position between the two. 100 is guided by the guide plate 101,
The base of the cutting blade 102 is attached to the link plate of the chain 100, and one sprocket 98 is rotationally driven by the motor 103. A guide bar 104 for guiding the sheet material 4 is fixed to the guide plate 101.

Further, 106 is a sheet material pressing tool which is driven up and down on the front side of the heat bonding heater 91, and is a lower beam portion 30B.
A presser roll 110 extending in the left-right direction is pivotally supported on a girder 109 which is vertically movable by a guide bush 108 attached to a beam 107 having both ends fixed to the girder 109, and the girder 109 is vertically moved by an air cylinder 111. Has become.

Next, in FIG. 1, reference numeral 115 is a selvage wrapping device disposed on both the left and right sides of the conveyor 2, which is a front end selvage 23 of the left and right projecting portion of the sheet material 4 wound around the article 3 in a body wrapping manner.
3 and the rear end ear portion 234 (see FIG. 29) are folded, the details of which are shown in FIGS. Reference numeral 116 is a spline shaft extending in the vertical direction, and the lower end portion of the spline shaft 13 is a cross table 13.
A bracket 117A fixed to a traverse table 13a and 13b (hereinafter, the other portions are also referred to as a general term) is rotatably supported by a bracket 117A, and an upper end portion thereof is rotatably supported by an arm 117B fixed to a moving frame 60. It is fitted in the spline hole of the supported upper boss 118 slidably in the vertical direction. 119
The first rotor has a brush 120 engaging with the lower portion of the side surface 3A of the article 3 on the conveyor 2 at the tip portion, and the base end portion is attached to a lower boss 121 fixed to the spline shaft 116. Reference numeral 122 denotes a second rotor, which has a brush 123 which engages with an upper and lower intermediate portion of the side surface 3A of the article 3 at a tip portion thereof, and has a base end portion which is a middle boss slidably fitted to the spline shaft 116 in a vertical direction. It is attached to 124. Compression springs 125 and 125 are interposed between the upper boss 118 and the middle boss 124, and between the middle boss 124 and the lower boss 121, and the middle boss 124 is moved by about ½ of the moving frame 60, and hence the bracket 117B. And the rotation of the spline shaft 116 by the motor 126 causes the first rotor 119 and the second rotor 122 to rotate once around the vertical axis from the standby position 127 shown by the chain line in FIG. There is. Then, this rotation direction is selected from two directions, a forward rotation direction indicated by an arrow p in which the rotor tip portion is directed in the same direction as the traveling direction of the article 3 (arrow Y direction), and a reverse rotation direction indicated by an opposite arrow r. To be done.

16 to 24, the upper and lower protrusions 231 and 232 (also shown in FIG. 29) of the left and right protrusions of the sheet material 4 wound around the article 3 are bent. A folding device 130 is shown. The folding device 130 includes an upper lower bending device 131 that bends an upper protruding portion 231 downward, and a lower protruding portion 232 that bends upward together with a tip portion of the upper protruding portion 231. It is composed of a lower upper bending device 132 for bending and an upper inner bending device 133 for bending an inner bending piece 235 at the tip of the lower overhanging portion 232 toward the center of the article. The ear folding device 115 installation portion (installation portion side) (Including the other side) to the front side, the conveyor 2 is disposed on both left and right sides. 17 to 20, the folding device 130 is a horizontal center line 1A of the article packaging device 1.
Although only one side portion is shown in the figure, the actual device has a structure symmetrical with respect to the left-right center line 1A, and the operations of the devices on both sides are also performed symmetrically.

The upper downward bending device 131 is supported on the moving frame 60 via a guide rod 141 so as to be able to move up and down (more specifically, to be movable along an inclined line 142 whose lower part is inclined inward as shown in FIG. 18). An upper lower curved plate 144 extending in the front-rear direction is supported by the beam 143 so as to be swingable around a horizontal shaft 145, and the upper lower curved plate 14 at the time of descending shown by a chain line in FIG.
The compression spring 147 elastically biases the beam 143 so that the tip portion 146 of 4A is pressed toward the side surface 3A of the article 3.
An air cylinder 148 is provided as a drive device for vertically moving the upper lower curved plate 144 via the.

The lower upper bending device 132 is supported on the traverse table 13 via a guide rod 151 so as to be able to move up and down (more specifically, to be movable along an inclined line 152 whose upper part is inclined inward as shown in FIG. 19). A lower upper curved plate 154 having a substantially L-shaped cross section that extends in the front-rear direction is supported by the beam 153 so as to be swingable around a horizontal shaft 155, and the lower upper curved plate 154 when ascended.
The air cylinder 157 is attached to the lower upper curved plate 154 and the beam 1 so that the upper corner portion 156 of A is pressed toward the side surface 3A of the article 3.
The lower upper curved plate 154 is interposed between the beams 53 and the beam 153.
Is provided with an air cylinder 158 as a drive device for vertically moving.

The upper inner bending device 133 is moved in the left-right direction by a guide rod 161 mounted between the outer girder 60A and the inner girder 60B of the moving frame 60 (specifically, as shown in FIG. Line 162 that is slightly inclined downwards
Beam 163 movably supported on the mounting plate 164
Is swingably supported about a horizontal shaft 165, and a lower mounting plate 166 is swingably supported on the mounting plate 164 about a horizontal shaft 167. The horizontal axis 1 is attached to the tip of the arm of the mounting plate 166.
69 is swingably supported, and the front end portion 170 of the upper inner curved plate 168A at the time of advancing shown by a chain line in FIG.
The compression spring 171 is interposed between the mounting plate 164 and the lower mounting plate 166 so that the product is pressed toward the upper surface 3B of the article 3, and the rear end portion 172 of the upper inner curved plate 168A during forward movement is also used. Is pressed against the upper surface 3B of the article 3 by its own weight, and the rear end 172 is engaged with the lower mounting plate 166 as shown in FIG. 21 so that the rear end 172 does not drop excessively. It is fixed to 168. The upper inner curved plate 168 is driven left and right by using an air cylinder 174 having a cylinder portion attached to the moving frame 60 and a piston rod connected to the beam 163 as a driving machine.

Further, in this specific example, the upper inner curved plate 168 is provided with four heaters 180 for thermally adhering the sheet material which can be projected downward at four positions spaced apart in the front-rear direction. FIG.
As shown in FIG. 24, the electrothermal heater 180 is fitted into the hole 181 formed in the upper inner curved plate 168, and the horizontal shaft 1 is fixed by the bracket 182 fixed to the upper inner curved plate 168.
A mounting plate 184 swingable around 83 is fixed to the mounting plate 184, and an arm 185 fixed to the mounting plate 184 is driven by an air cylinder 186 to move the heater 180 to a projecting position shown by a solid line and a drawing position shown by a chain line. It is designed to be switched.

In this specific example, when the lower upper curved plate 154 is driven upward, the tip of the lower protruding portion 232 of the sheet material bent upward by this is caught by the lower surface of the upper inner curved plate 168, In order to avoid incapability of bending, the air cylinder 175 causes the mounting plate 164, and thus the upper inner curved plate 168, to be driven up and down about the horizontal axis 165, but the upper inner curved plate 168 is If there is a space to retreat to the outside, attach the mounting plate 164 to the beam 16
The air cylinder 175 can be omitted by fixing to the device No. 3 and the device can be simplified.

25 to 28 show the interlocking and driving mechanism of the tape applicator 7, and in these figures as well as the folding device 130, the horizontal center line 1A of the article packaging device 1 is shown.
Although only one side portion is shown in the figure, an actual device has a bilaterally symmetrical structure with respect to the left-right centerline 1A, and operates in left-right opposite directions. First, in FIG. 26, the width detector 67 includes a photoelectric switch 19 for detecting the side edge 4A of the sheet material 4 at the tip of a transverse baffle 192 supported by a guide 191 on the rear surface of the mounting frame 66 so as to be movable in the left-right direction.
3 is provided, and one end of the wire 194 is connected to the base end of the traverse baffle 192 to drive the traverse baffle 192.
Comprised of 5. This wire 194 is wound around pulleys 196, 197 and 198 which are pivotally supported by the mounting frame 66,
As shown in FIG. 27, the mounting frame 66 and the moving frame 60 are respectively pivotally supported around the horizontal axis, and the wire winding points 201A, 2
02A has two pulleys 201, 201 on the vertical line 199.
After being wound around 02, it is wound around pulleys 203 to 207 which are rotatably supported by the moving frame 60, and is supported by the guide rail 9 attached to the moving frame 60 so as to be movable in the left-right direction. It is connected 7B to the base portion 7A of the tape applying machine 7.

The wire 194 is further extended,
The wire extension 194A is a pulley 2 pivotally supported by the moving frame 60.
After being wound around 08 and 209, the bracket 210 fixed to the rear end of the moving frame 60 is connected to the piston rod of an air cylinder 211 that extends in the left-right direction and has a cylinder portion attached thereto. It is pulled outward as shown by. The air cylinder 211 is an urging device that urges the tape sticking machine 7 in a direction to apply tension to the wire 194, and eliminates the slack of the wire 194 and causes the tape sticking machine 7 to accurately follow the movement of the wire 194. However, a weight may be used instead of the air cylinder 211, or the wire extension portion 194A may be omitted and the tape sticking machine 7 may be directly urged by the air cylinder 211 in the arrow s direction opposite to the arrow t. .

FIG. 25 shows the width detector 67 and the tape applying machine 7.
The width detector 67 is positioned on the mounting frame 66 integrated with the traverse table 13 (at the reference position described later) positioned with respect to the article having the width w before the start of the packaging of the article 3. , The transverse cross 192 is at the most retracted reference position,
The photoelectric switch 193, which is the width detection end at this time, is located at the reference position outside the side surface 3A of the article 3 by the predetermined distance a, and the tape applying machine 7 includes the lifting table 30 and the moving frame 60.
On the moving frame 60 positioned with respect to the article 3 having the width w together with the traverse table 13 and located at the inner side (the article center side) by the distance b from the side surface of the article 3.

Next, the article wrapping operation of the apparatus having the above construction will be described with reference to FIGS. First, the lifting table 30 and the moving frame 6 that moves up and down together with the lifting table 30.
0 to the rising end position and the roller 81 of the sheet material trailing end winding device 80 to the descending end position 81A (see FIG. 8) to input the value of the width w of the article 3 to be packed into the control device. The hydraulic cylinder 16 is driven by a predetermined amount by the
The horizontal intervals of the traversing stands 13a and 13b and the slat conveyors 11a and 11b are adjusted and positioned via 7 [see FIG. 31]. This state is set as a reference position, and at this reference position, the moving frame 6 is moved by the above-described position alignment in the left-right direction of the traverse table 13 and the moving frame 60 that moves together with the horizontal table 13.
An upper downward bending device 131 supported by 0 and a lower upward bending device 132 supported by the traverse table 13 are used for downward bending and lower downward protruding portions 231 of the sheet material with respect to the article 3 having the width w. By the upper inner bending device 133 which can be bent upward at 232 and is supported by the moving frame 60 at the rising end position, the height h ₀ which is the maximum height in the article to be packaged (in this specific example as described later, The inner curved piece 232A of the sheet material is inwardly bendable with respect to the article 3 (300 mm).

Next, the front guide plate 5 at the entrance of the conveyor 2
5 is lifted by the air cylinder 57, and the pinch roll 7
1 is rotated in the normal direction by the driving machine 72, the sheet material 4 having a length preset according to the length of the article 3 and the maximum height h ₀ is fed out, and the sheet material 4 is fed between the front guide plate 55 and the rear guide plate 53. It is supplied into the stocker 58 [see FIG. 32], and then the front guide plate 55 is lowered to open the pinch roll 71.

Next, the article 3 is stopped at a fixed position on the infeed conveyor 261, the height h of the article 3 is measured by the article height measuring device 50 [see FIG. 33], and the hydraulic cylinder is determined according to the measured value. The elevator 32 and the movable frame 60 integrated with the elevator 32 are lowered by the distance 32 by a distance d = h ₀ −h [see FIG. 34]. As a result, the upper inward bending device 133 is positioned at a position where inward bending can be performed on the article 3 having the height h. Further, as the lift table 30 descends, the roll support frame 40 and the roll 4R supported by the roll support frame 40 ascend by the same amount as the lift table 30 due to the engagement of the racks 42, 43 and the pinion 44.
As a result, the part of the sheet material 4 partially stored in the stocker 58 below the path line 2A of the conveyor 2 (is laid below the article 3 by the forward movement of the article 3 and wound around the rear end of the article 3). The length of the sheet material is corrected so as to be shortened by d = h ₀ −h, and even if the height of the article changes, the rear end portion of the sheet material remains at the same position on the article 3 and the front end portion of the sheet material. Therefore, heat sealing will be performed without any problems.

Further, when the movable frame 60 is lowered, the pulley 202 is moved downward together with the movable frame 60 in FIG. 27 d = h ₀
Since the wire 194 is lowered by -h, the wire 194 is loosened by the length d, and the tape sticking machine 7 is moved by d in the arrow s direction in FIGS.

Next, in the descending state, the width detector 6
The width of the sheet material 4 is detected by 7. That is, the traverse baffle 192 is driven toward the sheet material 4 by the air cylinder 195, and the photoelectric switch 193 causes the side edge 4A of the sheet material 4 to move.
Is detected, the drive by the air cylinder 195 is stopped,
The transverse baffle 192 is held in its stop position. As a result, the wire 194 is pulled by the transverse baffle 192 by the value e of the following equation, and the tape sticking machine 7 moves in the direction of the arrow t by the distance e (see FIG. 25). e = (w / 2) + a− (y / 2) (1) where w: width of article 3 y: width of sheet material 4

Since the tape applying machine 7 has moved in the direction of the arrow s by the amount d of lowering of the moving frame 60, the moving amount e mentioned above due to the width detection is added to this, and the tape applying machine 7 The article 3 comes to a position inwardly from the side surface of the article 3 (toward the center of the article) by the distance f shown below. f = b + d-e = b + (h 0 -h) - [w / 2 + a-y / 2 ] _{= b + h 0 -a-h} + (y-w) / 2 ... (2)

On the other hand, in FIG. 30, the tip end position of the inner bent piece 232A when the lower bulging portion 232 of the sheet material 4 of width y which is wrapped around the article 3 of width w is bent after being bent upward is not shown. Assuming that the thickness of the bent upper protrusion 231 is neglected, the following z from the side surface 3A of the article 3 is apparent as shown in the drawing.
Come to the position. z = [(y−w) / 2] −h (3) Then, by comparing the equations (1) and (2), the relations of b + h ₀ −a = 0 (4) are obtained. If you set each initial value,
The position f = z of the tape applying machine 7 by the above-mentioned interlocking mechanism 69 is set, and the tape applying machine 7 determines, depending on the height of the article 3 and the width of the sheet material 4, the tip position of the inner bending piece portion 232A, that is, the desired tape. It will be automatically positioned at the pasting position. In this specific example, for h ₀ = 300 mm, a = 5
By adopting 00 mm and b = 200 mm, the above automatic positioning is realized. Since this automatic positioning is independently performed by the left and right interlocking mechanisms 69 of the article 3, even if the rolls 4R of the sheet material 4 are set in the left and right directions, the sheets in the misaligned state can be set. The width detectors 67a and 67b individually detect the left and right side edges of 4, and the interlocking mechanism 69 automatically positions the tape applicators 7a and 7b at the tip positions of the left and right inner bending piece portions 232A, respectively. To be done.

When the width w of the article 3 is changed, it is possible to change the width w of the article 3 as shown in FIG.
Since the positional relationship of the article 3 is always maintained, the tape applicator 7 is positioned according to the width of the article 3 by the positioning of the traverse table 13, and the height of the article 3 by the interlocking mechanism 69 is increased. Since the positioning is added according to the width of the sheet material 4 and the width of the sheet material 4, the tape applying machine 7 is automatically positioned at the tape application position according to the width and height of the article 3 and the width of the sheet material 4. Of.

Next, following the above steps, the infeed conveyor 26
When 1 and the conveyor 2 are driven in the forward direction, the article 3 enters the conveyor 2, and along with this, the sheet material 4 hanging down across the entry path is laid under the article 3, Further, it moves forward while pulling out the necessary sheet material 4 from the roll 4R [see FIG. 35].

When the article 3 having the front end portion wound with the sheet material 4 in a body-wrapping shape passes through the 115 part of the ear winding device by the above-mentioned forward movement, the first rotor 119 and the second rotor 122 are moved by the arrow r. Direction (see FIG. 15), the front end ear portion 233 of the sheet material 4 is folded, and the conveyor 2 is stopped when the rear end of the article 3 passes the roller 81 of the sheet material rear end winding device 80. Pressing roll 110 of the sheet material pressing tool 106
Is lowered to press the sheet material 4 against the upper surface of the article [see FIG. 36]. This prevents the slack of the sheet material 4 on the article 3.

Then, the roller 8 is rotated by the roller supporting mechanism 83.
1 is lifted to lift the rear portion of the sheet material 4 by the roller 81 [see FIG. 37], and then the roller 81 is moved forward and lowered a small amount at the forward end position to press the rear portion of the sheet material 4 against the upper surface of the article, When the air is blown out forward from the blow-out pipe 77, the rear end portion 4B of the sheet material 4 is blown out forward and becomes a shape along the upper surface of the article 3. Then, when the roller 81 is rotated in the direction of arrow u by the roller driving device 84, the sheet material 4 is wound around the rear portion of the article 3 without any slack, and the upper and lower bent corners of the sheet material 4 are angled. Issued [Fig. 3
8]. If the sheet material 4 is highly rigid, the above-mentioned air blowing or the installation of the air blowing pipe 77 may be omitted.

Next, after the rotation of the roller 81 is stopped, the heat-bonding heater 91 is driven downward to heat-bond the superposed portion of the sheet material 4, and the cutting blade 102 is driven to run by the motor 103 in the cutter 96 portion to drive the sheet. The material 4 is cut [see FIG. 39], the heat bonding heater 91 and the press roll 11 are cut.
0 is raised and the pinch roll 71 is reversed to move the sheet material 4 until the leading edge of the sheet material reaches the exit portion of the pinch roll 71.
And the roller 81 of the sheet material rear end portion winding device 80 is brought into contact with a stopper (not shown).
Return to 1 A [see FIG. 40].

The sheet material 4 wound around the article 3 in the above-mentioned 6 parts of the body winding device is cut by the cutter 96 on the rear end portion 4B of the sheet material 4 as shown as a body winding product 250 in FIG. 29 (b). The front end portion 4C thus formed is heat-bonded 241 in an overlapped manner, and the front end portion 4C on the upper side faces the rear side opposite to the article advancing direction shown by the arrow Y. It is possible to prevent the front end portion 4C from being caught or turned over by the contacting member and causing the sheet material 4 to be broken. Further, at the time of heat bonding in FIGS. 38 to 39, the sheet material 4 is pressed by the pressing roll 110 and the roller 81 in the vicinity of both front and rear ends in a state without slack, and the pressing roll 110 and the pinch roll 71.
(Specifically, the sheet material 4 wound around the drive roll 71A) is pressed down by the adhering heater 91 that descends to apply tension and heat bond (including during heat bond), and then the cutter 9
Since the sheet material 4 is cut by 6, the sheet material 4 is wrapped around the article 3 without sagging as a whole, and the wrapped article 250 having a good appearance is obtained.

Next, the conveyor 2 is driven forward, and when the rear end of the article 3 reaches the ear winding device 115, the conveyor 2 is stopped and the first rotor 119 and the second rotor 122 are moved by the arrow p. The sheet material 4 is rotated in the normal direction, and the rear edge portion 234 of the sheet material 4 is folded. By this, the sheet material 4 wound around the article 3
29, the front end ears 233 and the rear end ears 234 are folded as shown in FIG. 29 (c).

Next, the bending process by the bending device 130 is started. First, in the upper lower bending device 131, the air cylinder 14 is moved.
The upper lower curved plate 144 is driven downward by 8 [see FIG. 41]. As a result, in FIG. 18, the tip portion 146 of the upper lower curved plate 144 that descends along the inclined line 142 together with the beam 143 bends the upper protruding portion 231 of the sheet material downward, and the tip portion of the protruding portion is As shown in FIG. 18 and FIG. 29 (d), it descends until it overlaps with the lower extension portion 232. At this time, since the tip end portion 146 of the upper lower curved plate 144 is elastically urged toward the side surface 3A of the article 3 by the compression spring 147, the upper protruding portion 231 is pressed downward on the side surface by the tip end portion 146. The sheet material 4 is bent while being pulled by a frictional force, and the bent corners of the sheet material 4 are angled to obtain a bent state in which the sheet material 4 is bent along the side surface 3A into a flat plane without slack.

Next, with the upper lower curved plate 144 kept in the lowered state, in the lower upper curved device 132, the air cylinder 15
8, the lower upper curved plate 154 is driven to rise [see FIG. 42]. As a result, in FIG. 19, the upper corner portion 156 of the lower upper curved plate 154 that rises along the slant line 152 together with the beam 153 has the lower protruding portion 232 of the sheet material and the upper protruding portion 231 that overlaps with this. Bend the tip upwards,
The upper surface 154B of the L-shaped lower upper curved plate 154 rises until it reaches the upper surface position of the article 3. At this time, the lower upper curved plate 154
Since the upper corner portion 156 is pneumatically biased toward the side surface of the article 3 by the air cylinder 157, the lower protruding portion 23
2 and the tips of the upper overhanging portions 231 have upper corners 15
6 is pressed against the surface of the upper lower curved plate 144 in the lowered position and is bent upward while being pulled by frictional force.
The bent corners are angled and bent into a flat surface without slack. Then, when the lower upper curved plate 154 reaches the rising end, the upper lower curved plate 144 is pulled out upward, but this also does not change the above-mentioned planar bending state, and the lower extension portion 232 makes the lower upper curved plate 232. The upper corner portion 156 of the plate 154 continues to be pressed toward the side surface of the article 3.

Next, in the upper inner bending device 133, the upper inner bending plate 168 is made horizontal by the air cylinder 175 as shown by the solid line in FIG. 20, and then the upper inner bending plate 168 is moved to the center side of the article 3 by the air cylinder 174. It is driven forward in the direction [see FIG. 43]. As a result, in FIG.
The tip 170 of the upper inner curved plate 168, which moves in the left-right direction along the slanted line 162 together with 63, causes the inner curved piece 232A of the lower overhanging portion 232 projecting above the article 3 to move to the center of the article 3. Fold it to the side. At this time, the upper inner curved plate 16
8 is elastically urged downward by the compression spring 171 and the rear end 172 side is gravitationally urged by the weight of the upper inner curved plate 168.
A is bent while being pressed against the upper surface of the article 3 (specifically, the sheet material 4 covering the upper surface of the article 3) by the upper inner curved plate 168 while being pulled by the frictional force toward the center of the article. The part is angled and bent into a flat surface without slack.

When the upper inner curved plate 168 reaches the forward end, the air cylinder 186 in FIG.
The heater 180 is pressed and heated on the inner curved piece 232A to thermally bond 242 the inner curved piece 232A and the sheet material 4 below the inner curved piece 232A over a plurality of locations. As a result, a good bent state is maintained until the subsequent tape application.

After thermal bonding by the heater 180, the conveyor 2 and the discharge conveyor 262 are operated while the inner curved piece 232A is being pressed by the upper inner curved plate 168.
The front end portion 4C of the sheet material wound around the article 3 is shown in FIG.
As shown in FIG. 5, the front end is not caught by the upper inner curved plate 168 which is slidably contacted with the sheet material by the operation of the conveyor, so that the front end does not break. Then, the front end portion of the folded packaged product 251 (see FIG. 29) on which the folding (in this specific example, the temporary bending of the inner bending piece portion 232A by the heater 180) in the folding device 130 is completed is the tape sticking machine 7 portion. Upon arrival, the tape applying machine 7 detects this arrival and starts applying the adhesive tape 8 to the overlapping portion between the leading edge of the inner curved piece 232A and the sheet material 4 covering the article upper surface [FIG. ], The tape application is continued by the forward movement of the folded package 251, and when the rear end of the package reaches the tape applying machine 7, the tape applying machine 7 detects this arrival and cuts the adhesive tape 8, The tape application is completed [see FIG. 45].

As described above, the tape applying machines 7a and 7b operate the interlocking mechanism 6 according to the width and height of the article 3 and the width of the sheet material 4.
Since it is automatically positioned at the tip position of the inner bending piece portion 235 by 9, the adhesive tape 8 can be attached to an appropriate position without manually adjusting the position of the tape applying machine 7.

After that, the upper inner curved plate 1 of the upper inner curved device 133
68 moves backward and returns to the retracted position where it is rotated upward by the air cylinder 175, the lower upper curved plate 154 of the lower upper bending device 132 returns to the lowered position by the air cylinder 158, and the width detector 67 also traverses. When the 192 returns to the most retracted reference position and the elevating table 30 is raised to the ascending end position, the interlocking mechanism 69 also causes the tape pasting machine 7 to return to the reference position, and the article packaging apparatus 1 is in the reference state shown in FIG. Then, the above process may be repeated for the next new article 3 conveyed by the infeed conveyor 261.

The obtained packaged product 252 (see FIG. 29) is
Since the folded packaging product 251 does not have a swelling or sagging of the sheet material by the folding device 130, and the bent corner portion of the sheet material is rounded, the tape is attached to the folded packaged product 251. It has an excellent appearance.

The present invention is not limited to the above-mentioned specific examples. For example, a driving mechanism such as an upper lower curved plate, a lower upper curved plate, an upper inner curved plate, an urging means, a lift, a traverse, a moving frame, etc. The drive mechanism and the like may be other than the above. Further, when the fluctuation of the width of the article is small, the conveyor 2 may not be mounted on the traverse table and may have a constant conveyor width.

Further, in the above specific example, a plurality of heaters 180 are provided on the upper inner curved plate 168, but instead of this, the article 3 is used.
A heater having a length capable of being heat-bonded with respect to the maximum length may be attached to the upper inner curved plate 168 and used, or when the sheet material is a material in which the bent shape is easily maintained,
The attachment of the heater 180 to the upper inner curved plate 168 may be omitted. As the ear-folding device, a device provided with a rotor other than the above-mentioned brush type, such as one in which a rubber roller is pivotally supported at the tip of an elastic plate, may be used, and the variation in height of the article is not large. In some cases, the rotor may be rotated at a fixed vertical position.

Further, in the above-described specific example, since the folding device 130 bends the laterally protruding portion of the sheet material 4 with respect to the body winding product 250 having a good appearance obtained by the body winding device 6, the body winding direction and the folding direction are bent. It is possible to obtain a packaged product having a superior appearance without sagging of the sheet material in the direction.
In the sheet material overlapping and adhering portion, since the front end portion 4C of the sheet material is heat-adhered so as to face the upper side and the rear side,
It has an advantage that the front end portion 4C is prevented from being turned over or torn in a later step. However, depending on the rigidity or strength of the sheet material, instead of the above-described body winding device 6, for example, Japanese Patent Laid-Open No. Other types of body-wrapping devices such as the body-wrapping device in the article wrapping device described in Japanese Patent Publication No. 226415 may be used. Further, in the above specific example, the interlocking mechanism 69
With the automatic positioning of the tape applicator by, it is possible to achieve further labor saving and productivity improvement of the packaging line.
When the width and height of an article do not fluctuate much, a tape applicator which does not have the interlocking mechanism 69 and which is positioned by another type of positioning mechanism such as manual adjustment or switching may be used.

[0058]

As described above, according to the present invention,
Bending the sheet material while sliding the upper lower curved plate, the lower upper curved plate, and the upper inner curved plate biased by spring force, air pressure, self-weight, etc. onto the sheet material to be folded Therefore, the folded corner portion of the sheet material is rounded, and the packaged material having an excellent appearance is obtained in which the sheet material is bent in a flat shape without swelling or sagging.

Further, according to the second aspect of the invention, since the inner bending piece portion after the bending step is heat-bonded by the heater, the good bending state of the sheet material by the bending device is maintained as it is. In this state, subsequent tape application can be performed, and even if the material of the sheet material is difficult to maintain the bent state, or even if the folding device section and the tape applying machine are separated from each other, it is good. It is possible to obtain a tape-applied product having an excellent appearance by tape-applying a folded packaged product in a bent state.

Further, according to the third aspect of the invention, since the vertical position of the second rotor is changed in association with the lift table which is moved up and down according to the height of the article, the height of the article is changed. Also, the second rotor does not come off from the side surface of the article upward, and the second rotor whose vertical position is variable and the first rotor which is located at a fixed lower position of the second rotor protect the sheet material wrapped around the article. It is possible to surely fold the ear portion regardless of the variation in the height of the article.

According to the invention described in claim 4, the ear portion of the sheet material can be surely folded into a shape along the side surface of the article by the sliding contact of the flexible brush. The structure is also simple.

[Brief description of drawings]

FIG. 1 is a front view of a main part of an article packaging apparatus showing a specific example of the present invention.

FIG. 2 is a plan view of the article packaging apparatus of FIG.

FIG. 3 is a side view taken along the line AA of FIG.

FIG. 4 is a plan view of the conveyor 2 portion of the apparatus of FIG.

5 is a side view taken along the line BB of FIG.

6 is a cross-sectional view taken along the line CC of FIG.

FIG. 7 is a sectional view taken along line DD of FIG. 4;

8 is a vertical cross-sectional view of a central portion of a sheet material rear end winding device 80 portion of the device of FIG.

9 is a plan view taken along the line EE of FIG.

10 is a sectional view taken along line FF in FIG.

11 is a sectional view taken along line GG of FIG.

12 is a sectional view taken along line HH of FIG.

13 is a cross-sectional view taken along the line I-I of FIG.

14 is a cross-sectional view taken along the line JJ of FIG.

15 is a sectional view taken along line KK of FIG.

16 is a partially cutaway front view of the folding device section in the device of FIG. 1. FIG.

FIG. 17 is a sectional view taken along line LL in FIG.

FIG. 18 is an enlarged view of an M portion in FIG.

FIG. 19 is an enlarged view of an N portion in FIG.

20 is an enlarged view of an O part in FIG.

21 is a cross-sectional view taken along the line P-P of FIG.

22 is a sectional view taken along the line QQ of the upper inner curved plate 168 in FIG.

23 is a plan view taken along the line RR in FIG.

FIG. 24 is a cross-sectional view taken along the line SS of FIG.

25 is a plan view of an interlocking mechanism 69 section in the apparatus of FIG. 1. FIG.

FIG. 26 is an enlarged plan view of a T portion in FIG. 25.

FIG. 27 is a cross-sectional view taken along line U-U of FIG. 25.

28 is a side view taken along the line V-V in FIG.

29 is a perspective view showing a packaged state of an article by the apparatus of FIG. 1. FIG.

30 is a vertical cross-sectional view showing the relationship between the width of the article, the width of the sheet material, and the bent state when the article is packaged by the apparatus of FIG.

31 is a schematic front view showing a packaging process of articles by the apparatus of FIG. 1. FIG.

32 is a schematic front view showing a packaging process of articles by the apparatus of FIG. 1. FIG.

33 is a schematic front view showing a packaging process of articles by the apparatus of FIG. 1. FIG.

34 is a schematic front view showing a packaging process of articles by the apparatus of FIG. 1. FIG.

35 is a schematic front view showing the packaging process of the articles by the apparatus of FIG. 1. FIG.

36 is a schematic front view showing a packaging process of articles by the apparatus of FIG. 1. FIG.

37 is a schematic front view showing a packaging process of articles by the apparatus of FIG. 1. FIG.

38 is a schematic front view showing a packaging process of articles by the apparatus of FIG. 1. FIG.

39 is a schematic front view showing the packaging process of the article by the apparatus of FIG. 1. FIG.

40 is a schematic front view showing the packaging process of the articles by the apparatus of FIG. 1. FIG.

41 is a schematic front view showing a packaging process of articles by the apparatus of FIG. 1. FIG.

42 is a schematic front view showing a packaging process of articles by the apparatus of FIG. 1. FIG.

43 is a schematic front view showing a packaging process of articles by the apparatus of FIG. 1. FIG.

44 is a schematic front view showing a packaging process of articles by the apparatus of FIG. 1. FIG.

45 is a schematic front view showing a packaging process of articles by the apparatus of FIG. 1. FIG.

FIG. 46 is a perspective view of relevant parts showing a folding operation in the folding device section of the conventional article packaging apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Article packaging apparatus, 2 ... Conveyor, 3 ... Article, 4 ... Sheet material, 5 ... Base frame, 6 ... Body winding apparatus, 13a ... Traverse stand, 13
b ... Traversing table, 26 ... Driving machine, 30 ... Lifting table, 32 ... Hydraulic cylinder, 60a ... Moving frame, 60b ... Moving frame, 115 ...
Ear winding device, 116 ... Spline shaft, 119 ... First rotor, 120 ... Brush, 122 ... Second rotor, 123 ...
Brush, 126 ... Motor, 130 ... Bending device, 131 ...
Upper lower bending device, 132 ... Lower upper bending device, 133 ... Upper inner bending device, 144 ... Upper lower bending plate, 147 ... Compression spring, 14
8 ... Air cylinder, 154 ... Lower upper curved plate, 157 ... Air cylinder, 158 ... Air cylinder, 168 ... Upper inner curved plate, 171 ... Compression spring, 174 ... Air cylinder, 180
... Heater, 186 ... Air cylinder, 231, ... Upper extension part, 232 ... Lower extension part, 233 ... Front end ear part, 234 ...
Rear ear.

Claims (4)

[Claims] 1. A front end ear portion and a rear end ear portion of left and right overhanging portions of a sheet material having thermal adhesiveness wound around an article on the conveyor in a body winding shape are folded on both left and right sides of a conveyor for conveying an article. In addition to providing an ear-folding device, a lifting platform that is supported above and below the conveyor so that it can move up and down, a horizontal platform that is arranged on both the left and right sides of the conveyor and that can move in the left and right directions, and a horizontal direction that moves in the lifting platform. A movable frame that is freely supported and that engages with the traverse table and moves up and down together with the elevating table to move in the left-right direction together with the traverse table, extends in the front-rear direction, and is biased toward the side surface of the article; An upper lower bending device, which supports the lower bending plate to be movable up and down on the moving frame, and which is provided with a driving machine for driving the upper lower bending plate up and down, and a lower portion which extends in the front-rear direction and is biased toward the side surface of the article. The upper curved plate is the traverse stand A lower upper bending device, which is supported by the upper and lower parts of the lower upper bending plate and has a driving mechanism for driving the lower upper bending plate up and down, and an upper inner bending plate extending in the front-rear direction and biased toward the upper surface of the article. A fold for bending the upper and lower overhangs of the left and right overhanging portions, which is movably supported in the left and right direction and is provided with an upper inward bending device including a driving device for driving the upper inner bending plate left and right. An article packaging device, wherein bending devices are arranged on both left and right sides of the conveyor. 2. The article packaging apparatus according to claim 1, wherein a heater for heat-bonding the sheet material is provided on the upper inner curved plate of the upper inner curved apparatus so as to be capable of protruding and retracting downward. 3. The ear-folding device is rotatably supported around a vertical axis on a side of the conveyor, and is raised and lowered in association with the lifting and lowering of the lift table to perform the first rotation. It is arranged above the child and is driven by the rotary drive to move the first
The article packaging apparatus according to claim 1 or 2, comprising a rotor and a second rotor which is rotationally driven around the vertical axis. 4. The article packaging apparatus according to claim 3, wherein the first rotor and the second rotor are provided with brushes at their tips.